Asia - advice on weather?

i am planning a trip to Bali, Phuket, and Siem Reap next summer and was curious if anyone knew the best time to hit SE Asia. i am leaning on Early June '08, but i can change it if there is a problem with rain...

thanks in advance for any help...

Bali is the best at that time of year. Stay in Indonesia and vist Borobudor on Java and save Angkor Wat for next time.